KD*P frequency doubler for high average power applications.

摘要

We describe here the development and operation of a kilowatt scale KD*P second harmonic generator. The design utilizes a simple and compact two-plate alternating-Z configuration with a transverse thermal gradient. The calculated single pulse conversion efficiency is between 50 and 75% for beams whose divergence is up to 15 times the diffraction limit. Offline subaperture tests demonstrated that the effect of induced thermal gradients on conversion efficiency was less than 5% for optical loads expected for kilowatt operation. Full aperture tests with a 300 watt average power Nd:glass zig-zag slab laser gave conversions of 35%. 4 refs., 10 figs. (ERA citation 15:032885)